Spells are broken into 4 distinct parts; however, only 1 of these parts are required for the spell's function: The Invocation. The 4 parts are, in order, The Focus, The Chant, The Invocation, and The Declaration. Most simple spell only have an Invocation, and occasionally a Declaration, but most complex spells have all 4 parts.

Invocation is the art of using your voice to command the elements of the universe to follow your will. Invocation is only part of spellcasting that is required to be vocalized in Ro Keru'ku. Most Invocations begin with an Invocation Word, such as (so'), "So'", usually translated as 'Invoke', as it declares the following statement to be a magical command.